Apple Inc.

Hongqin Zhang

Shizhe Shen

Michael DiVincent

Chong Yip Chow

Cheng Kai Chen

Gabriel G Marcu

Jiaying Wu

Iain A McAllister

Robin Brian Jenkin

Anuj Bhatnagar

A method is provided for calibrating a display having color channels. Each color channel is capable of adjusting settings for pixel values at gray level entries. The method includes selecting a gray level entry for calibration. The method also includes providing a target white point in chromaticity coordinates (x, y) and a target brightness at the selected gray level entry to the display. The method further includes adjusting the setting for the pixel values for the color channels at the selected gray level entry such that the display achieves the target white point and the target brightness at an adjusted pixel value.

Methods for display uniform gray tracking and gamma calibration

An operator friendly camera testing module is described. The camera testing module includes at least a color shift evaluation unit and a color non-uniformity evaluation unit. The color shift evaluation unit providing a color shift metric and the color non-uniformity evaluation unit providing a color non-uniformity metric each used to characterize a digital camera.

Digital camera imaging evaluation module

A digital image captured by a digital camera module is scaled to a smaller size, and separately horizontal direction filtered and vertical direction filtered using one-dimensional spatial filters. The horizontal direction filtered image and the vertical direction filtered image are combined, wherein edge regions and corner regions of the combined filtered image are created differently than its middle region. The combined filtered image is then thresholded selected pixels of the thresholded image are marked as a blemish region. Other embodiments are also described and claimed.

Camera blemish defects detection

The embodiments of the invention here are automated systems and processes for testing a camera device. The processes can detect dark signal non-uniformity (DSNU) within a digital image that has been captured by a solid-state imaging sensor of the camera device under test. Techniques that may be able to detecting localized and global color drifts of various shapes have been described and claimed.

Digital camera testing for dark signal non-uniformity

A portable device has a rear facing camera assembly and a front facing display assembly that includes at least a protective cover layer, a display stack that includes a plurality of display components arranged in a plurality of interconnected layers, the display stack providing an imaging service, and a flat support chassis arranged to provide support for the display stack. In the described embodiment, a protective cover can wrap around and protect at least the rear portion of the portable device without adversely affecting an image capture process carried out by the rear facing camera assembly.

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San Jose, CA, United States of America

Hongqin Zhang